v3.26.1
Cover page
 12 Months Ended
Dec. 31, 2025
shares
Entity Information [Line Items]  
Document Type 20-F
Document Registration Statement false
Document Annual Report true
Document Period End Date Dec. 31, 2025
Current Fiscal Year End Date --12-31
Document Transition Report false
Document Shell Company Report false
Entity File Number 001-39777
Entity Registrant Name NANOBIOTIX S.A.
Entity Incorporation, State or Country Code I0
Entity Address, Address Line One 60 rue de Wattignies
Entity Address, Postal Zip Code 75012
Entity Address, City or Town Paris
Entity Address, Country FR
Title of 12(b) Security Ordinary shares, nominal value €0.03 per share
Security Exchange Name NASDAQ
Entity Common Stock, Shares Outstanding 48,410,068
Entity Well-known Seasoned Issuer No
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Accelerated Filer
Entity Emerging Growth Company false
ICFR Auditor Attestation Flag true
Document Financial Statement Error Correction [Flag] false
Document Accounting Standard International Financial Reporting Standards
Entity Shell Company false
Entity Central Index Key 0001760854
Document Fiscal Year Focus 2025
Document Fiscal Period Focus FY
Amendment Flag false
No Trading Symbol Flag true
American depositary shares, each representing one ordinary share, nominal value €0.03 per share  
Entity Information [Line Items]  
Title of 12(b) Security American depositary shares, each representing one ordinary share, nominal value €0.03 per share
Trading Symbol NBTX
Security Exchange Name NASDAQ
Business Contact  
Entity Information [Line Items]  
Entity Address, Address Line One 60 rue de Wattignies
Entity Address, Postal Zip Code 75012
Entity Address, City or Town Paris
Entity Address, Country FR
Contact Personnel Name Mr. Bart van Rhijn
City Area Code 33
Local Phone Number (0)1 40 26 04 70
Contact Personnel Fax Number 33 (0)1 40 26 04 44